Biochar-supported nZVI (nZVI/BC) for contaminant removal from soil and water: A critical review

Wang, Shengsen,Zhao, Mingyue,Zhou, Min,Li, Yuncong C.,Wang, Jun,Gao, Bin,Sato, Shinjiro,Feng, Ke,Yin, Weiqin,Igalavithana, Avanthi Deshani,Oleszczuk, Patryk,Wang, Xiaozhi,Ok, Yong Sik Elsevier 2019 Journal of hazardous materials Vol.373 No.-

<P><B>Abstract</B></P> <P>The promising characteristics of nanoscale zero-valent iron (nZVI) have not been fully exploited owing to intrinsic limitations. Carbon-enriched biochar (BC) has been widely used to overcome the limitations of nZVI and improve its reaction with environmental pollutants. This work reviews the preparation of nZVI/BC nanocomposites; the effects of BC as a supporting matrix on the nZVI crystallite size, dispersion, and oxidation and electron transfer capacity; and its interaction mechanisms with contaminants. The literature review suggests that the properties and preparation conditions of BC (e.g., pore structure, functional groups, feedstock composition, and pyrogenic temperature) play important roles in the manipulation of nZVI properties. This review discusses the interactions of nZVI/BC composites with heavy metals, nitrates, and organic compounds in soil and water. Overall, BC contributes to the removal of contaminants because it can attenuate contaminants on the surface of nZVI/BC; it also enhances electron transfer from nZVI to target contaminants owing to its good electrical conductivity and improves the crystallite size and dispersion of nZVI. This review is intended to provide insights into methods of optimizing nZVI/BC synthesis and maximizing the efficiency of nZVI in environmental cleanup.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Aggregation and passivation of nZVI can be alleviated by surfactants and doping methods. </LI> <LI> BC hinders corrosion and improves the dispersion and electron transfer of nZVI. </LI> <LI> Properties of nZVI depend on those of the BC, feedstock and pyrogenic temperature. </LI> <LI> BC enhances electron transfer from nZVI to the contaminants due to the presence of quinone and graphene moieties. </LI> <LI> nZVI/BC shows strong ability to remove HMs, nitrates, and organic contaminants in soil and water. </LI> </UL> </P>

Quercetin in a Lotus Leaves Extract May be Responsible for Antibacterial Activity

Mingyu Li,Zhuting Xu 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.5

In the course of a search for chemotherapeutic agents inhibiting suspected peridontitis bacteria, extracted and purified substances from lotus leaf were identified by antimicrobial activity tests with use of the broth micro-dilution methods on 96-microwell plate. The antimicrobial activity of extracts was tested against five microorganisms, namely: Actinobacillus actinomycetemcomitans Y4, Actinomyces viscosus 19246, Porphyromonas gingivalis 33277, Fusobacterium nucleatum 25586, and Actinomyces naeslundii wvl 45. The most active antimicrobial extract was subjected to spectroscopic analysis using UV, mass spectrometry, and by 1H, 13C-, nuclear magnetic resonance spectroscopy. Our data showed that the minimum inhibitory concentrations of the most active extract were 0.625, 1.25, 1.25, 0.625 and 2.5 mg/mL for A. actinomycetemcomitans, A. viscosus, P. gingivalis, F. nucleatum, and A. naeslundii, respectively. The component that had a greatest antimicrobial activity was determined to be quercetin. Thus, we conclude that quercetin extracted from lotus leaves may be a potential antibacterial agent for periodontitis

중국어 동량사구문의 형식과 의미의 일반화 연구

MINGYUE LI 한국중국언어학회 2023 중국언어연구 Vol.- No.104

This paper analyzes the form and meaning characteristics of the verb classifier construction ‘X+Num+VCL’, and takes ‘X’ and the verb classifiers as the center to examines the productivity, schematicity, and compositionality of the verb classifiers constructions, and identifies the generalized content, degree and application scope of of the verb classifiers constructions. In addition, the theoretical basis for the generalization of the constructions is presented, in which there are two types of inheritance relations, ‘IS’ and ‘IM’, in the development of the verb classifier constructions, and various influencing factors. According to the results of the study, atypical constructions ‘A/N+Num+VCL’ exist in all constructions, and the expansion of the form and semantic function of such constructions shows an inconsistent degree in various constructions, but the fact of expansion itself and the direction of expansion shows a consistent orthodromic character in the constructions of verb classifiers. It can be seen that the generalization of the verb classifier constructions is universal (or at least has the directionality of universal development of constructions) and does not occur only for particular high-frequency verb classifier constructions. The expansion of verb classifier constructions is a cyclic system, as the language is constantly changing and the above sentence expansions will continue to evolve according to the use of the language users. 본고는 동량사구문인 “X+Num+VCL”의 형식과 의미 기능 특징을 분석하고, ‘X’와 동량사를 중심으로 각 구문의 생산성, 도식성, 합성성을 고찰하여 동량사구문의 일반화 내용, 정도, 적용범위 등을 확인하였다. 또한 본고는 동량사구문의 일반화에 대해 이론적인 근거를 제시하였는데, 동량사구문의 발전에 있어 “IS”와 “IM”의 두 가지 상속관계가 존재하고, 또한 여러 가지 영향 요인이 존재한다는 것을 밝혔다. 이런 동량사구문의 형식과 의미 기능의 확장은 각종 동량사구문에서 불일치한 정도로 나타나지만, 그 확장 사실 자체와 확장 방향은 각종 동량사구문에서 일치하는 경향적 특징을 보인다. 이러한 연구 결과를 통해, 동량사구문의 일반화는 특별한 고빈도 동량사에서만 나타나는 것이 아니라, 동량사구문이 구문 자체로 어느 정도의 보편성을 (적어도 동량사구문의 보편적 발전 방향성을) 가지고 있다는 사실을 확인할 수 있다. 그리고 언어는 계속 변화하고 있으므로 위와 같은 구문 확장은 언어의 사용에 따라 지속적으로 끊임없이 발전해 나갈 것이고, 동량사구문의 확장은 하나의 무한한 순환적인 시스템으로 볼 수 있을 것이다.

Pulse-width Adjustment Strategy for Improving the Dynamic Inductor Current Response Performance of a Novel Bidirectional DC–DC Boost Converter

Mingyue Li,Peimin Yan 전력전자학회 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.1

This paper presents a pulse-width adjustment (PWA) strategy for a novel bidirectional DC–DC boost converter to improve the performance of the dynamic inductor current response. This novel converter consists of three main components: a full-bridge converter (FBC), a high-frequency isolated transformer with large leakage inductance, and a three-level voltage-doubler rectifier (VDR). A number of scholars have analyzed the principles, such as the soft-switching performance and high-efficiency characteristic, of this converter based on pulse-width modulation plus phase-shift (PPS) control. It turns out that this converter is suitable for energy storage applications and exhibits good performance. However, the dynamic inductor current response processes of control variable adjustment is not analyzed in this converter. In fact, dc component may occur in the inductor current during its dynamic response process, which can influence the stability and reliability of the converter system. The dynamic responses under different operating modes of a conventional feedforward control are discussed in this paper. And a PWA strategy is proposed to enhance the dynamic inductor current response performance of the converter. This paper gives a detailed design and implementation of the PWA strategy. The proposed strategy is verified through a series of simulation and experimental results.

Quercetin in a Lotus Leaves Extract May be Responsible for Antibacterial Activity

Li, Mingyu,Xu, Zhuting 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.5

In the course of a search for chemotherapeutic agents inhibiting suspected peridontitis bacteria, extracted and purified substances from lotus leaf were identified by antimicrobial activity tests with use of the broth micro-dilution methods on 96-microwell plate. The antimicrobial activity of extracts was tested against five microorganisms, namely: Actinobacillus actinomycetemcomitans Y4, Actinomyces viscosus 19246, Porphyromonas gingivalis 33277, Fusobacterium nucleatum 25586, and Actinomyces naeslundii wvl 45. The most active antimicrobial extract was subjected to spectroscopic analysis using UV, mass spectrometry, and by $^1H$, $^{13}C-$, nuclear magnetic resonance spectroscopy. Our data showed that the minimum inhibitory concentrations of the most active extract were 0.625, 1.25, 1.25, 0.625 and 2.5 mg/mL for A. actinomycetemcomitans, A. viscosus, P. gingivalis, F. nucleatum, and A. naeslundii, respectively. The component that had a greatest antimicrobial activity was determined to be quercetin. Thus, we conclude that quercetin extracted from lotus leaves may be a potential antibacterial agent for periodontitis.

Pulse-width Adjustment Strategy for Improving the Dynamic Inductor Current Response Performance of a Novel Bidirectional DC-DC Boost Converter

Li, Mingyue,Yan, Peimin The Korean Institute of Power Electronics 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.1

This paper presents a pulse-width adjustment (PWA) strategy for a novel bidirectional DC-DC boost converter to improve the performance of the dynamic inductor current response. This novel converter consists of three main components: a full-bridge converter (FBC), a high-frequency isolated transformer with large leakage inductance, and a three-level voltage-doubler rectifier (VDR). A number of scholars have analyzed the principles, such as the soft-switching performance and high-efficiency characteristic, of this converter based on pulse-width modulation plus phase-shift (PPS) control. It turns out that this converter is suitable for energy storage applications and exhibits good performance. However, the dynamic inductor current response processes of control variable adjustment is not analyzed in this converter. In fact, dc component may occur in the inductor current during its dynamic response process, which can influence the stability and reliability of the converter system. The dynamic responses under different operating modes of a conventional feedforward control are discussed in this paper. And a PWA strategy is proposed to enhance the dynamic inductor current response performance of the converter. This paper gives a detailed design and implementation of the PWA strategy. The proposed strategy is verified through a series of simulation and experimental results.

构式语法视角下的汉语数量词构式研究

LI MINGYUE 한국중어중문학회 2023 한국중어중문학회 학술대회 자료집 Vol.2023 No.4

Effect of annealing temperature on resistive switching behavior of Al/ La0.7Sr0.3MnO3 /LaNiO3 devices

Li Juanfei,Wu Lei,Ma Mingyu,Song Ruifeng,Dong Chunhui,Wei Junfang,Li Jinsheng,Wang Xiaoqiang,Li Mingya 한국물리학회 2023 Current Applied Physics Vol.46 No.-

La0.7Sr0.3MnO3 (LSMO)/LaNiO3 (LNO) thin films were deposited successively on Si single crystal by the sol-gel method. The bipolar resistive switching (RS) behavior was studied in Al/LSMO/LNO devices. Obvious current hysteresis was observed, the set (reset) voltage and resistance ratio were modulated by the annealing temperature of LSMO thin films. At the annealing temperature of 750 ◦C, good endurance and retention performance were obtained in the memory device. According to the fitting results of I–V curves, based on Schottky emission model, the conduction mechanisms of Al/LSMO/LNO devices were discussed. Our results may give a valuable insight on developing perovskite-type rare earth manganese oxide.

Antecedents of Group Identification and Its Effects on Within-Domain Consumption

Zhonghua LI,Mingyue LI,Nak-Hwan CHOI 한국유통과학회 2021 Asian Journal of Business Environment (AJBE) Vol.11 No.2

Purpose: Current research aimed at exploring whether group entitativity and satisfaction to becoming the member of group have positive effects on group identification, and whether group identification has positive effects on within-in-group domain consumption. This research focused on the mediation role of group identification in the effects of the group entitativity and the satisfaction to becoming the member of group on the within-in-group domain consumption. Research design, data, and methodology: We selected Shandong Province as our experimental target group and people living in Shandong province as our respondents. 316 questionnaire data were collected. The structural equation model in AMOS 26 were used to verify hypotheses. Results: First, group entitativity affected group identification positively. Second, satisfaction to becoming the member of group affected group identification positively. Third, group identification positively influenced on the within-in-group domain consumption. Fourth, the group identification played the full mediation roles in the effects of both the group entitativity and the satisfaction on the within-in-group domain consumption. Conclusions: marketers should highlight the group identification with their target group by stimulating the perception of the consumer's group entitativity and satisfied feelings about the group to induce the intent to purchase their brand as within-in-group domain consumption object.

汉语“才+VP”构式中“才”的时体功能研究

李明月 ( Li Mingyue ) 한국중국언어학회 2021 중국언어연구 Vol.- No.94

The high-frequency word “才”, as an adverb of time, has not been solidified into tense-aspect morphology like “已经”, “刚才”, “正在” and other adverbs of time, which is related to its complex multi-function. The study of “才” should not be limited to its syntax, semanteme, or pragmatics, but it is necessary to investigate its variety in tense and aspect. In this paper, we study the specific function of tense and aspect of “才” in “才+VP”, and conclude that it can reflect the tenses of past, present and future according to different contexts; at the same time, it is able to express perfective, continuous and progressive aspect, and the “tense” and “aspect” of which obey certain rules collocation. While understanding meaning of the tense and aspect of “才”, we analyze its characteristics as well, and draw a conclusion that “才” has the characteristics of dynamicity, integrity/non-integrity, and reality/non-reality, which have an impact on the tense and aspect function of “才”. Meanwhile, we analyze some complex correlations between semantic orientation and aspect meaning of “才”. Through this paper, we are able to understand the versatility of “才” more deeply, comprehensively and systematically, so as to better understand sentences and contexts, which is meaningful in education and language learning.